EP 1845116 A1 20071017 - Fluoropolymer dispersion purification
Title (en)
Fluoropolymer dispersion purification
Title (de)
Reinigungsverfahren für Fluorpolymer-Dispersionen
Title (fr)
Methode de purification d'une dispersion de fluoropolymères
Publication
Application
Priority
EP 06112473 A 20060411
Abstract (en)
The invention pertain to a process for purifying a fluoropolymer dispersion, said process comprising: (i) providing an aqueous dispersion (D) of at least one fluoropolymer [polymer (F)] comprising at least one fluorinated surfactant [surfactant (FS)], having a solids content (SC) of 15 % by weight or more; (ii) adding to said aqueous dispersion (D) at least one non-ionic non-fluorinated surfactant [surfactant (NS)]; (iii) adjusting said solid content (SC) to less than10 % by weight, to obtain a diluted aqueous dispersion (dD); (iv) contacting said diluted aqueous dispersion (dD) with at least one adsorbing material, so as to obtain an aqueous dispersion of polymer (F) having a content of the fluorinated surfactant (FS) of less than 1 ppm based on the total weight of solids. Still an object of the invention is an aqueous fluoropolymer dispersion comprising less than 1 ppm of fluorinated surfactant.
IPC 8 full level
C08F 6/16 (2006.01); C08F 6/24 (2006.01); C08J 3/03 (2006.01); C08L 27/12 (2006.01)
CPC (source: EP US)
C08F 6/16 (2013.01 - EP US); C08J 3/03 (2013.01 - EP US); C08L 27/12 (2013.01 - EP US); C08J 2327/12 (2013.01 - EP US); C08J 2327/18 (2013.01 - EP US); C08J 2327/20 (2013.01 - EP US); C08L 71/02 (2013.01 - EP US)
Citation (search report)
- [X] EP 1538177 A1 20050608 - SOLVAY SOLEXIS SPA [IT]
- [A] US 2005189299 A1 20050901 - MALVASI MARCO [IT], et al
- [X] WO 2005003190 A1 20050113 - DAIKIN IND LTD [JP], et al & EP 1645572 A1 20060412 - DAIKIN IND LTD [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1845116 A1 20071017; CN 101460527 A 20090617; CN 101460527 B 20150520; EP 2007819 A1 20081231; EP 2007819 B1 20140604; JP 2009533509 A 20090917; JP 5377286 B2 20131225; US 2009272944 A1 20091105; US 8859645 B2 20141014; WO 2007116037 A1 20071018
DOCDB simple family (application)
EP 06112473 A 20060411; CN 200780020832 A 20070406; EP 07727895 A 20070406; EP 2007053427 W 20070406; JP 2009504709 A 20070406; US 29648507 A 20070406